Polyethylene film having unique aesthetic and performance properties

Abstract

Certain films comprising polyethylene and poly(methyl 2-methylpropenoate) have unique aesthetic or performance properties.

What is claimed is: 
     
       1. A film comprising having at least one layer, wherein the at least one layer comprises:
 a) a polyethylene (PE) component comprising at least one PE polymer, wherein the PE component comprises 70% to 99%, by weight of the at least one layer; 
 b) a poly(methyl 2-methylpropenoate) (PMMA) component comprising at least one PMMA polymer, wherein the PMMA component comprises 1% to 30%, by weight of the at least one layer; 
 c) 0% to 15%, by weight of the at least one layer, of an optional ingredient; and
 wherein the at least one PMMA polymer and the least one PE polymer have a complex viscosity ratio below 4, and wherein complex viscosity is measured via a rotational rheometer from a temperature of 200° C. to 240° C. at 5° C./min heating speed, 1Hz frequency, and constant 5% strain, according to ASTM D4440-15. 
 
 
     
     
       2. The film of  claim 1 , wherein the complex viscosity ratio between the PMMA polymer and the PE polymer is below 3. 
     
     
       3. The film of  claim 1 , wherein the PMMA component and the PE component have a complex viscosity ratio range below 4, wherein the complex viscosity is measured via a rotational rheometer from a temperature of 200° C. to 240° C. at 5° C./min heating speed, 1Hz frequency, and constant 5% strain, according to ASTM D4440-15. 
     
     
       4. The film of  claim 1 , wherein the complex viscosity ratio between the at least one PMMA polymer and the at least one PE polymer is from 0.5 to 1.5, wherein the complex viscosity is measured via a rotational rheometer, from a temperature of 200° C. to 240° C., at 5° C./min heating speed, at 100 Hz frequency, and a constant 5% strain, according to ASTM D4440-15. 
     
     
       5. The film according to  claim 1 , wherein:
 (a) the at least one PMMA polymer has a complex viscosity from 150 Pascal-second (Pa*s) to 800 Pa*s, wherein the complex viscosity is measured via a rotational rheometer, from a temperature of 200° C. to 240° C., at 5° C./min heating speed, at 100 Hz frequency, and a constant 5% strain, according to ASTM D4440-15; and 
 (b) the at least one PE polymer has a complex viscosity of 250 Pascal-second (Pa*s) to 600Pa*S, wherein the complex viscosity is measured via a rotational rheometer, from a temperature of 200° C. to 240° C., at 5 20   C./min heating speed, at 100 Hz frequency, and a constant 5% strain, according to ASTM D4440-15. 
 
     
     
       6. A film comprising at least one layer, wherein the at least one layer comprises:
 a) a polyethylene (PE) component comprising at least one PE polymer, wherein the PE component comprises 70% to 99%, by weight of the at least one layer; 
 b) a poly(methyl 2-methylpropenoate) (PMMA) component comprising at least one PMMA polymer, wherein the PMMA component comprises 1% to 30%, by weight of the at least one layer;
 wherein the at least one PMMA polymer has a melt index from 1 gram (g)/10 minutes (min) to 16 g/10 min measured at 230° C. and 3.8 Kg according to ASTM D1238; 
 wherein the at least one PE polymer has a melt index from 0.1 gram (g) /10 minutes (min) to 40 g/ 10 min measured at 190° C. and 2.16 Kg according to ASTM D1238; 
 wherein the melt index ratio between the least one PMMA polymer and the least one PE polymer is greater than 0.7; and 
 
 c) 0% to 15%, by weight of the at least one layer, of an optional ingredient. 
 
     
     
       7. The film according to  claim 6 , wherein melt index ratio between the least one PMMA polymer and the least one PE polymer is from 0.7 to 70. 
     
     
       8. The film according to  claim 1 , wherein the film having a Flop Index (FI) of at least 1, according to ASTM E2539. 
     
     
       9. The film according to  claim 8 , wherein film having Light Reflectance Index (LRI) of at least 0.4, according to ASTM E2539. 
     
     
       10. The film according to  claim 7 , wherein the film having a Flop Index (FI) of at least 2, according to ASTM E2539; and a Light Reflectance Index (LRI) of at least 0.5, according to ASTM E2539. 
     
     
       11. The film according to  claim 1 , wherein the at least one PMMA polymer has a Vicat softening point below 115° C. at 1 kg and rate A according to ASTM D1525. 
     
     
       12. The film according to  claim 1 , wherein the PE component comprises 70% to 98%, by weight of the at least one layer; and the PMMA component comprises 2% to 25%, by weight of the at least one layer. 
     
     
       13. The film according to  claim 1 , wherein the PE polymer comprises a linear low density polyethylene (LLDPE), and wherein the LLDPE comprises from 30% to 100%, by weight of the PE component. 
     
     
       14. The film according to  claim 1  further comprising from 0.01% to 10%, by weight of the at least one layer of the film, of a silicone additive; wherein the silicone additive has a viscosity from 1,000 cSt to 40,000,000 cSt. 
     
     
       15. The film according to  claim 1 , further comprising 0.5% to 8%, by weight of the at least one layer, of a silicone additive, wherein the silicone additive has a molecular weight from 400,000 Daltons to 700,000 Daltons. 
     
     
       16. The film according to  claim 1 , further comprising 0.01% to 5%, by weight of the least one layer of the film, of a compatibilizer. 
     
     
       17. The film according to  claim 16 , wherein the compatibilizer is a maleic anhydride grafted linear low density polyethylene. 
     
     
       18. The film according to  claim 1 , having an opacity of greater than 55%, when measured at 50 microns thickness per ISO 6504. 
     
     
       19. A flexible film comprising having at least one layer, wherein the at least one layer comprises:
 a) a polyethylene (PE) component comprising at least a linear low-density polyethylene (LLDPE) polymer, wherein the PE component comprises 70% to 98%, by weight of the at least one layer; 
 b) a poly(methyl 2-methylpropenoate) (PMMA) component comprising at least one PMMA polymer, wherein the PMMA component comprises 1% to 30%, by weight of the at least one layer; 
 c) 1% to 10%, by weight of the at least one layer, of a silicone additive, wherein the silicone additive has a viscosity greater than 1,000 cSt per ASTM D-4287; and
 wherein the film has: a Flop Index (FI) of at least 1 according to ASTM E2539; and a Light Reflectance Index (LRI) of at least 0.4 according to ASTM E2539. 
 
 
     
     
       20. The film of  claim 19 , having an opacity of greater than 60%, when measured at 50 microns thickness per ISO 6504; and wherein film contains from 0% to less than 5%, by weight of the at least one layer, of titanium dioxide.